Great Plains 7336 DH Operator Manual - Manual (Page 30)

26 7000 Series II Table of Contents Index Great Plains Manufacturing, Inc.
556-235M Table of Contents Index 2014-06-30
15. Tractors with Pressure Detents: Set the flow control
so the machine raises completely in approximately 3
to 5 seconds. Detent should kick out automatically at
the end of stroke. If detent kicks out prematurely,
slow the flow on the tractor. If the flow has to be
slowed to the point that the unit does raise in an
acceptable time frame, the detent pressure on the
tractor may need to be increased. Contact your
dealer for information on how to do this. If this
problem still persists, contact the factory service
representative for other possible adjustments. Do not
try to adjust the valves on the disk harrow without
first contacting the factory service rep. Tractors with
pressure detents do not allow the system to
"automatically" re-phase at the top of the lift cycle.
This must be done manually. It is recommended that
after every couple of trips back and forth across the
field that the raise lever be pulled back and held
there 1-2 seconds after the machine is fully raised.
This will purge any air that has been ingested into
the system.
16. Fold Cylinders: Fold cylinders are to extended fully in
field position. Running the fold cylinders retracted
may cause excessive cylinder seal damage due to
constant loading from the flexing action of the wings.